The level of consistent CMIS support is highly variable in the industry, and we’re not seeing support for it in newer file repositories (e.g. Box, AWS S3). Even some which once supported it no longer do (e.g. latest versions of SharePoint). We’re not investing more in CMIS unless this changes.Most of the modern web storage options come with an SDK or easy-to-use REST APIs. That would be the route I choose, especially given Pega’s investment strategy in this area and the general direction and inertia of the industry towards more robust RESTful solutions.
Existing configs which presently work will continue to work.